<span class="kw">union</span> <span class="ident">Foo</span> {
    <span class="ident">i</span>: <span class="ident">i8</span>,
    <span class="ident">u</span>: <span class="ident">i8</span>,
}

<span class="kw">fn</span> <span class="ident">main</span>() {
    <span class="kw">let</span> <span class="ident">union</span> <span class="op">=</span> <span class="number">0</span>;
}
